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Dietary taurine supplementation enhances metamorphosis and growth potential of Solea senegalensis larvae
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Advisor(s)
Abstract(s)
The effect of dietary taurine supplementation on growth performance, metamorphosis success and amino
acid metabolism of Senegalese sole (Solea senegalensis) larvae was investigated. These parameters were
assessed in larvae fed control and taurine supplemented microcapsules during the pelagic phase.
Subsequently, a similar evaluation was carried out in newly settled larvae fed upon Artemia, in order to
verify the effect of earlier dietary taurine supplementation in larvae reared under improved feeding
conditions. Results showed that dietary taurine supplementation did not affect larval growth performance
and metamorphosis during the pelagic phase. However, by the end of the trial, Senegalese sole previously fed
taurine supplemented microcapsules had a significantly higher growth performance and metamorphosis
completion success than larvae fed control microcapsules. These differences were likely related to the
improvement of feeding conditions upon settlement, which probably helped revealing the positive effects of
earlier dietary taurine supplementation on Senegalese sole performance. Additionally, Senegalese sole may
have benefited from taurine antioxidant properties during metamorphosis, since larval antioxidant defences
may saturate at this stage. Furthermore, results from metabolic trials have shown that dietary taurine
supplementation significantly increased amino acid retention in Senegalese sole larvae when a concomitant
increase of taurine body levels was found. Therefore, an increase in larval growth potential and
metamorphosis success was observed under dietary taurine supplementation and these results may help
understanding why dietary taurine supplementation has been reported to simultaneously increase taurine
body levels and growth performance in other fish species, leading to a better comprehension on the role of
taurine during fish development.
Description
Keywords
Fish larvae Growth Metamorphosis Taurine
Citation
Pinto, W.; Figueira, L.; Ribeiro, L.; Yúfera, M.; Dinis, M.T.; Aragão, C.Dietary taurine supplementation enhances metamorphosis and growth potential of Solea senegalensis larvae, Aquaculture, 309, 1-4, 159-164, 2010